DRIVETRAIN MONITORING

By Published on July 20, 2020


Nacelle Monitoring Compliments Drivetrain Monitoring

Poster Presentation of a White Paper on The Benefits of Drivetrain Monitoring Nacelle Oscillation by diagnostic engineer A. Skimpas at AWEA Windpower 2015

Two vibration diagnosticians from the Brüel & Kjær Vibro Surveillance and Diagnostic Service Center in Denmark, together with two co-authors from the Technical University of Denmark, are presenting a paper at the American Wind Energy Association (AWEA) Windpower 2015 conference in Orlando, Florida (USA), 18-21 May, 2015. The title of the paper is “Advantages of Monitoring Wind Turbine Nacelle Oscillation” (Alexandros Skrimpas, et al.).

The paper deals with the benefits of monitoring the wind turbine nacelle, for detecting abnormal behavior associated with the blades, tower and drive train components, which could jeopardize their working condition. Nacelle monitoring, using accelerometers mounted on the nacelle frame, is an essential part of a holistic condition monitoring approach for wind turbines.

The paper presents a comparison of vibration signals from wind turbines subjected to various failure modes and operating conditions, such as blade misalignment, pitch malfunction, ice accretion, damaged blade tips and yaw system defects. The theoretical analysis that results in accurate detection of the aforementioned faults is also presented. Additionally the paper discusses the employment of nacelle accelerometers for cross reference of faults in the drive train components, where other sensors are also mounted. This cross reference is normally beneficial for assessing the severity of the faults, where propagation of vibrations from a drive train component to the nacelle frame usually indicates a late stage failure.

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